HUIDOBRO, Pedro et al. Orders preserving convexity under intersections for interval-valued fuzzy sets. In International Conference on Information Processing and Management of Uncertainty in Knowledge-Based Systems. medzinárodná konferencia. Information processing and management of uncertainty in knowledge-based systems : 18th international conference on information processing and management of uncertainty in knowledge-based systems, IPMU 2020, Lisbon, Portugal, June 15-19, 2020, proceedings, part 3. Vol. 1239. 1. vyd. - Cham : Springer Nature Switzerland AG, 2020. ISBN 978-3-030-50152-5. ISSN 1865-0929, s. 493-505. Dostupné na: https://doi.org/10.1007/978-3-030-50153-2_37.